When asked if Pacquiao, who is notorious for showing his competitors mercy, could be vulnerable to receiving that type of a punch if a Pacquiao-Mayweather fight happened, Roach said that Pacquiao "would have no problem" knocking him out.

Both Pacquiao and Roach said that when they first met, they knew they would be a great fit.

"My first impression when we do meet?" Pacquiao said. "I liked him."

Said Roach: "I never really met anybody that had the explosion that he has in his punches. . . . For a little guy, he weighed 122 pounds back then, it was just amazing."

Roach said that Pacquiao had only one good hand when he first started training him. After he lost to Erik Morales, Roach decided that needed to change.

"I told myself it was my job to make his right hand as good as his left."